How big is Tanzanite Storage?

Tanzanite Storage has a reported capacity of 283.2 MW. Source: EIA Form 860M.

What kind of plant is Tanzanite Storage?

Tanzanite Storage is a batteries facility in Henderson County, TX, participating in the ERCOT market.

Where is Tanzanite Storage located?

Tanzanite Storage is in Henderson County, TX, inside the ERCOT balancing area.

Who operates Tanzanite Storage?

Tanzanite Storage is operated by Tanzanite Energy Storage LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Tanzanite Storage generate?

Tanzanite Storage reported 82.9 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

How does Tanzanite Storage compare to other plants?

By capacity, Tanzanite Storage ranks #21 of 962 operating plants of the same technology nationally. It ranks #7 of 223 in TX.

Ask the Grid

/

Tanzanite Storage

Tanzanite Energy Storage LLC - Henderson County - ERCOT

Tanzanite Storage is a 283.2 MW battery energy storage facility located at 1315 County Road 318, Athens, Texas, in Henderson County. The facility is owned and operated by Tanzanite Energy Storage LLC, an indirect subsidiary of ENGIE North America Inc. through BRP Intermediateco I LLC. During development, the project was described as approximately 257 MW/514 MWh with a two-hour storage duration. The facility was commercially operational as of November 2025.

Open in grid

Loading map…

Tanzanite Storage

ERCOT · Asset profile

Ask about Tanzanite Storage

Answers use this researched asset profile with live ERCOT data. Ask about ownership, equipment, project history, or current grid context.

Try

Connect your own data

Live ERCOT public data · answers can be wrong, verify against source data or the ISO.

Tanzanite Storage — 283 MW battery storage, TX · Ask the Grid

Overview

Nameplate capacity: 283.2 MW
Canonical EIA plant baseline.
Registry anchor: Plant 69026
plant-69026

Infrastructure record

Mapped facility footprint: 6.45 mapped acres
Mapped infrastructure geometry associated with this asset.

Structured profile

Technology: Batteries
Operator: Tanzanite Energy Storage LLC

Related assets

Similar plants ranked by technology, capacity, and distance.

Cartwheel 1 - Storage, LLC

Batteries · 300 MW

Hopkins County

Same typeComparable scale61 mi away

Compare with this plant

Anole Energy Storage

Batteries · 240 MW

Dallas County

Same typeComparable scale47 mi away

Compare with this plant

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
TANZ	283.2 MW 257.8 MW summer	Batteries Electricity used for energy storage · BA	Nov 2025	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 283.2 MW
National rank: #21
TX rank: #7

Monthly generation

Download CSV

Latest 12 months

82.9 GWh

Reported gross generation

Latest report

Apr 2026

EIA-923 monthly filing

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Interconnection record

ERCOT GIS Report

Queue project

Tanzanite Storage

high match · 99/100 · project name, county, capacity

Queue ID / status

22INR0549 · Completed

Point of interconnection

6867 NORTH ATHENS 138kV

Interconnecting entity

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Local Regulatory Approval

Dec 12, 2023

Henderson County Commissioners Court designated the Tanzanite Storage site as a tax reinvestment zone. County officials reported the site as approximately 12 acres and identified Belltown Power Texas's COO as the project developer.

Henderson County

themonitor.net

Local Tax Incentive Approval

Jan 2024

Henderson County Commissioners Court approved a tax abatement agreement for Tanzanite Energy Storage LLC.

Henderson County · Tanzanite Energy Storage LLC

athensreview.com

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operator

Parties and identifiers

OrganizationRoleBasis

Tanzanite Energy Storage LLCOwner / operatorOwner and operator

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 12, 2023
Dec 12, 2023
Tax reinvestment zone designationthemonitor....
Henderson County Commissioners Court designated the Tanzanite Storage site as a tax reinvestment zone. County officials reported the site as approximately 12 acres and identified Belltown Power Texas's COO as the project developer.
Jan 2024
Jan 2024

Tanzanite Storage

Ask about Tanzanite Storage

Tanzanite Storage

Ask about Tanzanite Storage

Overview

Infrastructure record

Structured profile

Related assets

Cartwheel 1 - Storage, LLC

Anole Energy Storage

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Interconnection record

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

PP Jaguar BESS LLC

Platinum Storage

Cunningham Storage

SMT Ironman Battery Storage Plant

Nearby substations

Reporting portfolio

Sources

Common questions about Tanzanite Storage

How big is Tanzanite Storage?

What kind of plant is Tanzanite Storage?

Where is Tanzanite Storage located?

Who operates Tanzanite Storage?

How much electricity does Tanzanite Storage generate?

How does Tanzanite Storage compare to other plants?

Co-located assets